File:Steam locomotive work.gif

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Steam_locomotive_work.gif ‎(491 × 222 pixels, dimension del file: 87 KB, typo MIME: image/gif, repetente, 8 photogrammas, 0,8 s)

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Summario

Description
English: Steam locomotive wheels, valve & engine animation.

Walschaerts valve gear (mechanism for moving the valve in a steam engine).

Item 2 is a crank outside of the main crankpin. Its "timing" is a quarter turn away from the power crankpin. This provides the main force to move the valve.

Item 1 is pivoted (little dot, just below the callout arrow) to the frame (light gray) in the middle, so it rocks back and forth. It has a groove (inside; not shown) along its length, which carries a sliding block, pivoted on the left end of link 3. The engineer moves pushrod 8 left and right to move link 3 up and down.

If the link is below center, the engine moves backwards. If the link is near to the center, steam is conserved for ordinary running when up to speed.

The short link below the numeral 3 (not the arrow) that seems to point up into the air "from the wheel edge" is pivoted on the frame (not shown) at its upper end. It supports the rest of the links below it. The right end of link 3, therefore, doesn't move up and down much; its sidewise motion operates the valve.

Item 4 is the crosshead, the sliding piece that guides the piston rod. (Callout 4 also points to a link that improves valve timing.)

Note the typically-European piston rod -- it's very long, and unlike American (and some other) designs, it extends out front (to the right). The other types of locos. don't have any piston rod to the right side of the piston.

Item 5 is the pivot where the main connecting rod (long groove. shown, to make it lighter) connects to the crosshead.

Item 6 is the cylinder and valve block. Pinkish color is steam from the boiler. Exhaust is white. The valve is a pair of black vertical stripes, connected together. (It's shaped something like a spool.)

As shown (without animation), steam is going into the right side of the cylinder (Item 7), pushing the piston to the left. The piston rod pushes the crosshead, which pushes the main connecting rod. (The piston is in the middle of the cylinder. Unlike pistons in internal-combustion engines, steam pistons are discs.)
Deutsch: Heusinger- oder Walschaert-Steuerung

Legende:

1 - Schwinge
2 - Gegenkurbel (Schwingenkurbel)
3 - Schieberschubstange
4 - Voreilhebel
5 - Kreuzkopf
6 - Steuerzylinder mit Schieber
7 - Dampfzylinder
8 - Steuerstange
Origine Drawn by Panther using Corel Draw & Adobe Image Ready. The idea was taken from the book about 1-3-1 «Russian Prairie» «C» series locomotives by A.S. Nikolskiy, Moscow, 1997 (1-3-1 is in Russian notation, calculated by wheel pairs)
Autor Panther
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attribution condivider equalmente
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Steam locomotive wheels, valve and engine animation

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Wikimedia username anglese: Panther
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Historia del file

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Data/HoraMiniaturaDimensionesUsatorCommento
actual02:25, 22 april 2014Miniatura pro le version de 02:25, 22 april 2014491 × 222 (87 KB)CapmoReverted to version as of 16:59, 20 April 2005 - faster is better for seeing how it works
13:20, 3 junio 2006Miniatura pro le version de 13:20, 3 junio 2006491 × 222 (85 KB)JeLuFReupload, trying to force rerendering of thumbnails
15:20, 25 januario 2006Nulle miniatura (85 KB)Ed g2sMuch slower
16:59, 20 april 2005Miniatura pro le version de 16:59, 20 april 2005491 × 222 (87 KB)PantherSteam locomotive wheels animation {{cc-nc}} Category:Steam locomotive parts

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